[PATCH v3 30/31] ocfs2: check dinode refcount location in online filecheck

[Joseph Qi]

Wire the OCFS2_HAS_REFCOUNT_FL without i_refcount_loc predicate into the
filecheck validator.  A reflink-capable inode with no refcount tree
location cannot be reflinked or have its refcount tree removed cleanly.

Signed-off-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
---
 fs/ocfs2/inode.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 7e299b2dc8c0..6a7dff8a6a05 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -2196,6 +2196,14 @@ static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
 		}
 	}
 
+	if (ocfs2_dinode_has_refcount_without_loc(di)) {
+		mlog(ML_ERROR,
+		     "Filecheck: inode #%llu has refcount flag but no i_refcount_loc\n",
+		     (unsigned long long)bh->b_blocknr);
+		rc = -OCFS2_FILECHECK_ERR_INVALIDINO;
+		goto bail;
+	}
+
 bail:
 	return rc;
 }
-- 
2.39.3